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Controller inadvertently dropped data block, causing aircraft to penetrate adjacent sector and center airspace.
| Attributes | |
| ACN | 128630 |
| Time | |
| Date | 198911 |
| Day | Wed |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : fnt |
| State Reference | MI |
| Altitude | msl bound lower : 14000 msl bound upper : 14000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zob |
| Operator | general aviation : corporate |
| Make Model Name | Small Transport, Low Wing, 2 Turboprop Eng |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| ASRS Report | 128630 |
| Person 2 | |
| Affiliation | Other |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : instrument |
| Events | |
| Anomaly | non adherence : published procedure other anomaly other other anomaly other |
| Independent Detector | other controllera |
| Resolutory Action | none taken : anomaly accepted |
| Consequence | Other |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Intra Facility Coordination Failure Inter Facility Coordination Failure Operational Deviation |
Narrative:
Aircraft #1 traveling west 14000', handed off from toronto center to ZOB, flint sector. Aircraft #1 made initial radio contact and proceeded on course. Sometime later toronto center attempted radar handoff on aircraft #2 at 8000' to fnt sector. Aircraft #2 was below ZOB's radar coverage. When controller attempted to start a track (data block) for aircraft #2, the computer identify for aircraft #1 was mistakenly used, causing the data block for aircraft #1 to be disassociated from the actual radar target. Controller failed to notice that incorrect data block had been placed in the approximately position of aircraft #2, and with no data block connected to aircraft #2's target, allowed aircraft #1 to proceed through the ZOB lansing sector and into ZOB's area west/O handoffs.
Original NASA ASRS Text
Title: CTLR INADVERTENTLY DROPPED DATA BLOCK, CAUSING ACFT TO PENETRATE ADJACENT SECTOR AND CENTER AIRSPACE.
Narrative: ACFT #1 TRAVELING W 14000', HANDED OFF FROM TORONTO CENTER TO ZOB, FLINT SECTOR. ACFT #1 MADE INITIAL RADIO CONTACT AND PROCEEDED ON COURSE. SOMETIME LATER TORONTO CENTER ATTEMPTED RADAR HDOF ON ACFT #2 AT 8000' TO FNT SECTOR. ACFT #2 WAS BELOW ZOB'S RADAR COVERAGE. WHEN CTLR ATTEMPTED TO START A TRACK (DATA BLOCK) FOR ACFT #2, THE COMPUTER IDENT FOR ACFT #1 WAS MISTAKENLY USED, CAUSING THE DATA BLOCK FOR ACFT #1 TO BE DISASSOCIATED FROM THE ACTUAL RADAR TARGET. CTLR FAILED TO NOTICE THAT INCORRECT DATA BLOCK HAD BEEN PLACED IN THE APPROX POS OF ACFT #2, AND WITH NO DATA BLOCK CONNECTED TO ACFT #2'S TARGET, ALLOWED ACFT #1 TO PROCEED THROUGH THE ZOB LANSING SECTOR AND INTO ZOB'S AREA W/O HDOFS.
Data retrieved from NASA's ASRS site as of August 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.